Caleb Wyand Geeting Rohrer was born on November 20, 1873, at Eakle's Mill, Washington County, Maryland.

He was a physician and author recognized for his contributions to medical research, particularly in the areas of the prostate gland and cancer. He completed his early education at Eakle's Mill and Keedysville schools before earning a Bachelor of Science degree from the Shenandoah Institute of Virginia. He subsequently graduated from the College of Physicians and Surgeons of Baltimore and obtained both M.A. and Ph.D. degrees from Wesleyan University of Illinois. Following a three-year internship at Mercy Hospital in Baltimore, Dr. Rohrer served as an assistant bacteriologist with the Maryland Department of Health in 1902. He later advanced to the positions of assistant state health officer and chief of the Bureau of Communicable Diseases. In addition to his professional achievements, Dr. Rohrer was an active member of several medical organizations and authored multiple medical texts, including “A Contribution to the Comparative Anatomy of the Prostate Gland.” He was an avid reader with a particular appreciation for poetry, and he also composed his own verses.

In 1908, he married Emma Marie Albrecht Rohrer (1867–1945). He died on July 21, 1952, in Baltimore, Maryland.